Thank you Flwrs for posting this question and thank you ALL for the great responses! I am in the nearly same exact boat--First time chicken owner, having my 10 RIR chicks in a heated basement garage for the last 5 weeks. We will finish the coop/run this weekend and we are ALL more than ready for them to move to their 'palace'. The crazy difference is that my chickies are going to be living at our weekend farm, and we have actually been transporting them between our two places for the last few weeks (they have been able to adapt to their crazy transport schedule quite well). Our farm is in middle Georgia, and the coldest it will be this coming weekend/week will be 43 (F). I used a brooder plate for a heat source, but took it away last weekend (giving them some extra flying/running space in their pen as a bonus). I also have been giving them a dimmer light at night since I got them, and for the last two nights they've had no light (I'm turning the lights off before complete darkness so they can get used to the gradual light diminishing through the garage door windows). I've arranged to have a full 10 days starting this Friday at the farm to train them to go into their coop at night. I just hope and pray that 10 days is enough. We are making the coop/run super secure and predator-proof, but I do have a few questions:
* If I cannot get them trained to go into the coop at night in 10 days, what do you think the long-term consequences would be, if any? I mean, if they don't 'get it' now, will they just always refuse the coop? (I will have an 'always access' opening for them from coop to run)
* The coldest temperatures they've experienced to date has been about 65 (F). Though the days will be quite mild, will they be ok to plunge them into a sudden 20 degree nighttime difference? (They are pretty much 'fully feathered', except for some tiny bit of fuzz sticking out from the back of their necks--which, actually, may be gone by this weekend anyway).
Thanks again for your willingness to share your knowledge. I have been lurking here for quite some time, searching for answers to burning questions and preparing to care for my little ladies. You all have been a tremendous help!